Shuttle pin lock



Feb. 11, 1936. PARK 2,030,713

SHUTTLEPIN LOCK Filed March 30, 1935 all i/ INVENTOR.

Patented Feb. 11, 1936 UNlTED STATES PATENT OFFICE Bobbin & Shuttle Company 1929, Providence,

R. L, a corporation of Rhode Island Application March 30, 1935, Serial No. 13,938

3 Claims.

This invention relates to the spindles and pivot pins on which they are mounted in certain types of loom shuttles.

In a certain type of loom shuttle, there is a bobbin recess in which is a spindle on which a bobbin is carried in a loom. To place the bobbin on the spindle and to remove it therefrom, it is necessary or customary to mount the spindle on a pivot at one end of or a little beyond the bobbin recess, and to provide the spindle with a head of a certain curved shape which engages a spring plate, the parts being so arranged that when the spindle is swung up out of the bobbin recess to remove or replace the bobbin, the spindle is held in the desired position, and when it is swung back into the bobbin recess, it is held accurately in the desired position.

As now made, there is a pivot recess made in the wood and the pivot pin is driven or forced in through a pivot pin hole which extends from one side of the shuttle into the pivot recess, and preferably through it into the Wood at the other side. I

If such a pin works out so that it projects partly from the shuttle, it causes great damage as the shuttle moves across the lay beam by cutting the warp. To prevent this, it is generally glued in place, but the glue is not a positive lock and it still works out.

The purpose of this invention is to provide an assembly, in a shuttle, of a spindle, a pivot pin and a spring plate which will prevent the pivot pin from working out.

In the drawing, Fig. 1 is a plan view of a shuttle equipped with the device.

Fig. 2 is a horizontal sectional view through the wood or body at the level of the pivot pin, the pivot pin and spindle being shown in full lines.

Fig. 3 is an isometric view of a pivot pin.

Fig. 4 is a vertical longitudinal sectional View on the line 4, 4 of Fig. 2, showing the pivot pin in place in the mouth at the head of the spindle engaging the constricted part of the pivot pin.

Figs. 5 and 6 are views similar to Fig. 4, Fig. 6 showing the spindle in operative position, and Fig. 5 showing the spindle tipped up to receive the bobbin or to permit a bobbin to be removed therefrom.

In the drawing, A is a shuttle with the usual bobbin recess iii, a pivot recess H for a pivot pin P and in which the head end I of a spindle S can swing more or less vertically.

l2 and is are spring plate recesses for the top spring plate B and the bottom spring plate C which are held together in the usual manner by a bolt F and nut 20.

Spindle S has at one end the curved head 2, preferably at the bottom of which there is a. mouth 23 in head end i H3 is a pivot pin hole which extends in from one side of the shuttle through the pivot recess H, and preferably into the wood on the other side thereof.

The pivot pin is the principal feature of this invention, and its ends 5 and 6 are of a diameter to fit accurately the pivot pin hole 14 while the middle part 3 between shoulders 1, 8 is the same width as the material at'the head end I of spindle S and the same diameter as the sides of the mouth 23 which, at the top, is curved so that it can pivot or swing readily on pin P.

At head end i of spindle S, the material is curved at 9 so that it engages the top spring plate Bin the usual manner.

In assembling, the pivot pin is pushed or driven into the pivot pin hole 14 so that its constricted part 3 is in pivot recess ll, then the mouth 23 of head 2 is pushed down over it as shown in Fig. t, after which the top and bottom spring plates B and C are put in place and fastened or locked in position by means of the bolt F and its nut 20.

Top spring plate B operates on the curved part 9 of bed 2 of spindle S in the usual manner.

I claim:

1. The combination in a shuttle; having a bobbin recess, a pivot recess and a spring plate recess; of a spindle having a curved head and an open mouth; a pivot pm which passes transversely into the shuttle and through the pivot recess, said pin having a constricted part which pivotally engages the spindle mouth; and a spring plate positioned in the spring plate recess and in engagement with the spindle head.

2. The combination in a shuttle; having a pivot recess; of a spindle having a curved head and an open mouth; a pivot pin which passes transversely into the shuttle and through the pivot recess, said pin having a constricted part which 2 A a A a V 7 2,030,713

' pivotally engages the spindle mouth; andaspring the pivot recess, said pin having a constricted plate in engagement with the spindle head. part which pivotally engages the spindle mouth;

3. The combination in a shuttle having a pivand a spring plate in engagement with the top at recess; of a spindle having a head with an of the head of the spindle opposite the mouth. 5 open mouth at the bottom; .a pivot pin which 7 passes transversely into the shuttle and through CARL P. PARK. 

